Table 2.

The follow-up assessments and data collection timetable

Assessment	BL	SG	1 wk	2 wk	3 wk	1 mo	3 mo	6 mo
Informed consent	X
Baseline form	X
MRI	X							(X)
Randomisation		X
Adverse effects		X	X	(X)	(X)	X	X	X
WAS	X		X	(X)	(X)	X	X	X
Return to work			X	(X)	(X)	X	X	X
Return to previous activities			X	(X)	(X)	X	X	X
ODOM			X	(X)	(X)	X	X	X
Patients satisfaction to the treatment								X
Health resource utilisation			X	(X)	(X)	X	X	X
Clinical examination	X					(X)		(X)
NDI	X					X	X	X
NRS-AP	X		X	(X)	(X)	X	X	X
NRS-NP	X		X	(X)	(X)	X	X	X
EQ-5D-5L	X							X

() if required.

BL, baseline; mo, month postoperatively; NDI, Neck Disability Index; NRS-AP, Numeric Rating Scale Arm Pain; NRS-NP, Numeric Rating Scale Neck Pain; ODOM, Operative success; SG, surgery; WAS, Work Ability Score;wk, week postoperatively.